Handle release of 5.6.1
Handle release of 5.6.1

* Add a version constant for 5.6.2 so that the 5.6.1 constant
represents the 5.6.1 release and the 5.6.2 constant represents
the unreleased 5.6 branch.

scorpionvicky/elasticsearch,wenpos/elasticsearch,masaruh/elasticsearch,scorpionvicky/elasticsearch,gingerwizard/elasticsearch,ThiagoGarciaAlves/elasticsearch,scottsom/elasticsearch,mjason3/elasticsearch,qwerty4030/elasticsearch,wenpos/elasticsearch,gingerwizard/elasticsearch,GlenRSmith/elasticsearch,masaruh/elasticsearch,coding0011/elasticsearch,wangtuo/elasticsearch,gingerwizard/elasticsearch,robin13/elasticsearch,fred84/elasticsearch,rajanm/elasticsearch,GlenRSmith/elasticsearch,pozhidaevak/elasticsearch,markwalkom/elasticsearch,ThiagoGarciaAlves/elasticsearch,kalimatas/elasticsearch,kalimatas/elasticsearch,fred84/elasticsearch,pozhidaevak/elasticsearch,nknize/elasticsearch,wangtuo/elasticsearch,Stacey-Gammon/elasticsearch,uschindler/elasticsearch,scottsom/elasticsearch,robin13/elasticsearch,masaruh/elasticsearch,maddin2016/elasticsearch,markwalkom/elasticsearch,ThiagoGarciaAlves/elasticsearch,wangtuo/elasticsearch,nknize/elasticsearch,nknize/elasticsearch,GlenRSmith/elasticsearch,gfyoung/elasticsearch,ThiagoGarciaAlves/elasticsearch,pozhidaevak/elasticsearch,pozhidaevak/elasticsearch,scorpionvicky/elasticsearch,gingerwizard/elasticsearch,ThiagoGarciaAlves/elasticsearch,wenpos/elasticsearch,robin13/elasticsearch,gfyoung/elasticsearch,gfyoung/elasticsearch,HonzaKral/elasticsearch,fred84/elasticsearch,coding0011/elasticsearch,scottsom/elasticsearch,maddin2016/elasticsearch,mjason3/elasticsearch,scorpionvicky/elasticsearch,markwalkom/elasticsearch,uschindler/elasticsearch,rajanm/elasticsearch,robin13/elasticsearch,GlenRSmith/elasticsearch,s1monw/elasticsearch,wangtuo/elasticsearch,wangtuo/elasticsearch,maddin2016/elasticsearch,s1monw/elasticsearch,HonzaKral/elasticsearch,maddin2016/elasticsearch,uschindler/elasticsearch,Stacey-Gammon/elasticsearch,masaruh/elasticsearch,masaruh/elasticsearch,s1monw/elasticsearch,nknize/elasticsearch,gingerwizard/elasticsearch,markwalkom/elasticsearch,pozhidaevak/elasticsearch,coding0011/elasticsearch,markwalkom/elasticsearch,gingerwizard/elasticsearch,HonzaKral/elasticsearch,qwerty4030/elasticsearch,HonzaKral/elasticsearch,fred84/elasticsearch,mjason3/elasticsearch,coding0011/elasticsearch,markwalkom/elasticsearch,gingerwizard/elasticsearch,qwerty4030/elasticsearch,qwerty4030/elasticsearch,kalimatas/elasticsearch,nknize/elasticsearch,kalimatas/elasticsearch,scottsom/elasticsearch,coding0011/elasticsearch,Stacey-Gammon/elasticsearch,GlenRSmith/elasticsearch,gfyoung/elasticsearch,rajanm/elasticsearch,gfyoung/elasticsearch,Stacey-Gammon/elasticsearch,wenpos/elasticsearch,s1monw/elasticsearch,uschindler/elasticsearch,qwerty4030/elasticsearch,scottsom/elasticsearch,robin13/elasticsearch,ThiagoGarciaAlves/elasticsearch,scorpionvicky/elasticsearch,wenpos/elasticsearch,s1monw/elasticsearch,rajanm/elasticsearch,rajanm/elasticsearch,fred84/elasticsearch,maddin2016/elasticsearch,rajanm/elasticsearch,kalimatas/elasticsearch,uschindler/elasticsearch,mjason3/elasticsearch,Stacey-Gammon/elasticsearch,mjason3/elasticsearch